Weight Bar Assembly

ABSTRACT

A weight bar assembly comprises a connecting bar, a first end bar, a second end bar, a first weight, and a second weight. The first weight is configured to be mounted on the first end bar. The second weight is configured to be mounted on the second end bar. The first end bar comprises an elongated cylindrical shaft and a collar attached to the elongated cylindrical shaft. The second end bar comprises an elongated cylindrical shaft and a collar attached to the elongated cylindrical shaft. The weight bar assembly further comprises another connecting bar. The connecting bar is of a curled shape. The other connector bar is of a cylindrical shape. The first end bar and the second end bar may be selectively coupled to the connecting bar or the other connecting bar.

CROSS-REFERENCE TO RELATED APPLICATIONS

This patent is a Continuation-in-Part application of a Non-provisional patent application Ser. No. 16/516,156 filed on Jul. 18, 2019. Non-provisional patent application Ser. No. 16/516,156 claims the benefit of Provisional Patent Application 62/700,059, filed on Jul. 18, 2018 (a petition for late claiming the benefit of Provisional Patent Application 62/700,059 was submitted to USPTO on Mar. 15, 2021). The disclosure made in the Non-Provisional patent application Ser. No. 16/516,156 and the disclosure made in the Provisional Patent Application 62/700,059 are hereby incorporated by reference.

FIELD OF THE INVENTION

This invention relates generally to a weight bar assembly. More particularly, the present invention relates to a weight bar assembly comprising a connecting bar, two end bars and two weights.

BACKGROUND OF THE INVENTION

U.S. Pat. No. 7,364,536 to Cappellini et al. discloses a weight bar including an elongated tube having two opposing internally threaded ends. International Patent Publication No. WO9309850 to Siegfried discloses a long dumbbell and a short dumbbell. Korean Patent Application Publication No. KR20170050795 to Park discloses a weight bar including a pair of segments. U.S. Pat. No. 5,628,713 to Wilkinson discloses an adjustable exercise pole.

The weight bar assembly of instant application allows a user to conduct bench exercises and squat exercises. A time duration for assembling the weight bar assembly of instant application is reduced.

SUMMARY OF THE INVENTION

A weight bar assembly comprises a connecting bar, a first end bar, a second end bar, a first weight, and a second weight. The first weight is configured to be mounted on the first end bar. The second weight is configured to be mounted on the second end bar. The first end bar comprises an elongated cylindrical shaft and a collar attached to the elongated cylindrical shaft. A diameter of the collar of the first end bar is larger than a diameter of the elongated cylindrical shaft of the first end bar. The second end bar comprises an elongated cylindrical shaft and a collar attached to the elongated cylindrical shaft. A diameter of the collar of the second end bar is larger than a diameter of the elongated cylindrical shaft of the second end bar.

The weight bar assembly further comprises another connecting bar. The connecting bar is of a curled shape. The other connector bar is of a cylindrical shape. The first end bar and the second end bar may be selectively coupled to the connecting bar or the other connecting bar.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a side view of an element-interchangeable weight bar assembly in a separated condition in examples of the present disclosure.

FIG. 2 shows a side view of anther weight bar assembly in a separated condition in examples of the present disclosure.

FIG. 3 shows a side view of still anther weight bar assembly in a separated condition in examples of the present disclosure.

FIG. 4 shows a side view of a weight bar assembly in an assembled condition in examples of the present disclosure.

FIG. 5 shows a side view of a curled bar in examples of the present disclosure.

FIG. 6 shows a detailed view B of one end of the curled bar of FIG. 5 and a cross-sectional plot (cutting along the plane formed by AA′ vectors) of an end of an end bar of FIG. 1 in examples of the present disclosure.

FIG. 7 shows a top view of the curled bar of FIG. 5 in examples of the present disclosure.

FIG. 8 shows a side view of another weight bar assembly in an assembled condition in examples of the present disclosure.

FIG. 9 shows a side view of a straight bar of a cylindrical shape in examples of the present disclosure.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows a side view of an element-interchangeable weight bar assembly 100 in a separated condition in examples of the present disclosure. FIG. 4 shows a side view of the element-interchangeable weight bar assembly 100 in a first assembled condition in examples of the present disclosure. FIG. 8 shows a side view of the element-interchangeable weight bar assembly 100 in a second assembled condition in examples of the present disclosure.

Referring now to FIGS. 1, 4, and 8. The element-interchangeable weight bar assembly 100 comprises a first bar 120, a second bar 140, a first end bar 160, a second end bar 170, a first weight 180, and a second weight 190. In examples of the present disclosure, a shipping package to a customer includes the first bar 120, the second bar 140, the first end bar 160, the second end bar 170, the first weight 180, and the second weight 190. It is optional to include additional plurality of weights.

The first bar 120 comprises a first end 122 and a second end 124. The second bar 140 comprises a first end 142 and a second end 144. The first end bar 160 comprises an elongated cylindrical shaft 161 and a collar 169 attached to the elongated cylindrical shaft 161. The elongated cylindrical shaft 161 comprises a first end 162 and a second end 164. The second end bar 170 comprises an elongated cylindrical shaft 171 and a collar 179 attached to the elongated cylindrical shaft 171. The elongated cylindrical shaft 171 comprises a first end 172 and a second end 174. In examples of the present disclosure, a distance between the collar 169 and the first end 162 of the first end bar 160 is larger than a distance between the collar 169 and the second end 164 of the first end bar 160. In examples of the present disclosure, a distance between the collar 179 and the first end 172 of the second end bar 170 is smaller than a distance between the collar 179 and the second end 174 of the second end bar 170.

In examples of the present example, a length of the first bar 120 is longer than a length of the first end bar 160. A length of the first bar 120 is longer than a length of the second end bar 170. A length of the first end bar 160 is the same as a length of the second end bar 170.

In a separated condition (FIG. 1), the first bar 120, the second bar 140, the first end bar 160, the second end bar 170, the first weight 180, and the second weight 190 are separated from one another.

In a first assembled condition (FIG. 4), the first weight 180 is mounted on the elongated cylindrical shaft 161 of the first end bar 160. The first weight 180 contacts the collar 169 of the first end bar 160. The second weight 190 is mounted on the elongated cylindrical shaft 171 of the second end bar 170. The second weight 190 contacts the collar 179 of the second end bar 170. The first end 122 of the first bar 120 is attached to the second end 164 of the elongated cylindrical shaft 161 of the first end bar 160. The second end 124 of the first bar 120 is attached to the first end 172 of the elongated cylindrical shaft 171 of the second end bar 170. The second bar 140 of FIG. 1 is separated from other components. In one example, a length of an entirety of the element-interchangeable weight bar assembly in the first assembled condition (FIG. 4) is 6 feet.

In a second assembled condition (FIG. 8), the first weight 180 is mounted on the elongated cylindrical shaft 161 of the first end bar 160. The first weight 180 contacts the collar 169 of the first end bar 160. The second weight 190 is mounted on the elongated cylindrical shaft 171 of the second end bar 170. The second weight 190 contacts the collar 179 of the second end bar 170. The first end 142 of the second bar 140 is attached to the second end 164 of the elongated cylindrical shaft 161 of the first end bar 160. The second end 144 of the second bar 140 is attached to the first end 172 of the elongated cylindrical shaft 171 of the second end bar 170. The first bar 120 of FIG. 1 is separated from other components. In one example, a length of an entirety of the element-interchangeable weight bar assembly in the second assembled condition (FIG. 8) is 6 feet.

FIG. 5 shows a side view (a first viewing direction perpendicular to the XZ plane) of the first bar 120 of a curled shape in examples of the present disclosure. FIG. 7 shows a top view (a second viewing direction perpendicular to the XY plane) of the first bar 120 (a curled bar seems flat in the second viewing direction) in examples of the present disclosure. An entirety of a centerline 127 of the first bar 120 is on the XZ plane. The first bar 120 further comprises a first circular arc section 132, a flat section 134, and a second circular arc section 136. The flat section 134 is positioned between the first circular arc section 132 and the second circular arc section 136. In examples of the present disclosure, a radius of curvature of the first circular arc section 132 is the same as that of the second circular arc section 136.

FIG. 9 shows a side view of the second bar 140 of a cylindrical shape in examples of the present disclosure.

A diameter of the collar 169 of FIG. 1 of the first end bar 160 is larger than a diameter of the elongated cylindrical shaft 161 of the first end bar 160. A diameter of the collar 179 of FIG. 1 of the second end bar 170 is larger than a diameter of the elongated cylindrical shaft 171 of the second end bar 170.

Referring now to FIGS. 1, 4, and 6, the first end 122 of the first bar 120 comprises a free end 611, a non-threaded section 624, and a threaded section 634. The threaded section 634 is shorter than the non-threaded section 624. In one example, with the non-threaded section 624, a length of the threaded section is reduced from 2.5 inch to 0.5 inch, thus reducing assembling time (because of less threads). The non-threaded section 624 is between the free end 611 and the threaded section 634. The second end 164 of the first end bar 160 comprises a cavity 632, a non-threaded section 644, and a threaded section 654. The cavity 632 comprises a stop 636. In the first assembled condition (FIG. 4), a vertical surface 610 of the free end 611 contacts the stop 636 of the cavity 632. The threaded section 634 of the free end 611 of the first end 122 of the first bar 120 is engaged with the threaded section 654 of the second end 164 of the first end bar 160.

In one example, in the first assembled condition (FIG. 4), the non-threaded section 624 is loosely disposed in the cavity 632. In this case, an outer dimeter of the non-threaded section 624 is in a range from 80% to 95% of an inner diameter of the non-threaded section 644. In another example, in the first assembled condition (FIG. 4), the non-threaded section 624 is lightly pressed (still rotatable) in the cavity 632. In this case, an outer dimeter of the non-threaded section 624 is in a range from 100.01% to 102% of an inner diameter of the non-threaded section 644.

Similar to the first end 122 of the first bar 120 and the second end 164 of the first end bar 160 shown in FIGS. 1, 4, and 6, in the first assembled condition (FIG. 4), the second end 124 of the first bar 120 is engaged with the first end 172 of the second end bar 170. The second end 124 of the first bar 120 comprises a free end, a non-threaded section, and a threaded section. The threaded section is shorter than the non-threaded section of the second end 124 of the first bar 120. The non-threaded section of the second end 124 of the first bar 120 is between the free end of the second end 124 of the first bar 120 and the threaded section of the second end 124 of the first bar 120. The first end 172 of the second end bar 170 comprises a cavity, a non-threaded section, and a threaded section. In the first assembled condition (FIG. 4), a vertical surface of the free end of the second end 124 of the first bar 120 contacts the stop of the cavity of the first end 172 of the second end bar 170. The threaded section of the free end of the second end 124 of the first bar 120 is engaged with the threaded section of the first end 172 of the second end bar 170.

Similar to the first end 122 of the first bar 120 and the second end 164 of the first end bar 160 shown in FIGS. 1, 4, and 6, in the second assembled condition (FIG. 8), the first end 142 of the second bar 140 is engaged with the second end 164 of the first end bar 160. The first end 142 of the second bar 140 comprises a free end, a non-threaded section, and a threaded section. The threaded section is shorter than the non-threaded section of the first end 142 of the second bar 140. The non-threaded section of the first end 142 of the second bar 140 is between the free end of the first end 142 of the second bar 140 and the threaded section of the first end 142 of the second bar 140. The second end 164 of the first end bar 160 comprises a cavity 632, a non-threaded section 644, and a threaded section 654. The cavity 632 comprises a stop 636. In the second assembled condition (FIG. 8), a vertical surface of the free end of the first end 142 of the second bar 140 contacts the stop 636 of the cavity 632. The threaded section of the free end of the first end 142 of the second bar 140 is engaged with the threaded section 654 of the second end 164 of the first end bar 160.

Similar to the first end 122 of the first bar 120 and the second end 164 of the first end bar 160 shown in FIGS. 1, 4, and 6, in the second assembled condition (FIG. 8), the second end 144 of the second bar 140 is engaged with the first end 172 of the second end bar 170. The second end 144 of the second bar 140 comprises a free end, a non-threaded section, and a threaded section. The threaded section is shorter than the non-threaded section of the second end 144 of the second bar 140. The non-threaded section of the second end 144 of the second bar 140 is between the free end of the second end 144 of the second bar 140 and the threaded section of the second end 144 of the second bar 140. The first end 172 of the second end bar 170 comprises a cavity, a non-threaded section, and a threaded section. The cavity comprises a stop. In the second assembled condition (FIG. 8), a vertical surface of the free end of the second end 144 of the second bar 140 contacts the stop of the cavity of the first end 172 of the second end bar 170. The threaded section of the free end of the second end 144 of the second bar 140 is engaged with the threaded section of the first end 172 of the second end bar 170.

FIG. 2 shows a side view of a weight bar assembly 200 in a separated condition in examples of the present disclosure. FIG. 4 shows a side view of the weight bar assembly 200 in an assembled condition in examples of the present disclosure.

Referring now to FIGS. 2 and 4. The weight bar assembly 200 comprises a bar 120, a first end bar 160, a second end bar 170, a first weight 180, and a second weight 190. In examples of the present disclosure, a shipping package to a customer includes the bar 120, the first end bar 160, the second end bar 170, the first weight 180, and the second weight 190. It is optional to include additional plurality of weights.

The bar 120 comprises a first end 122 and a second end 124. The first end bar 160 comprises an elongated cylindrical shaft 161 and a collar 169 attached to the elongated cylindrical shaft 161. The elongated cylindrical shaft 161 comprises a first end 162 and a second end 164. The second end bar 170 comprises an elongated cylindrical shaft 171 and a collar 179 attached to the elongated cylindrical shaft 171. The elongated cylindrical shaft 171 comprises a first end 172 and a second end 174.

In a separated condition (FIG. 2), the bar 120, the first end bar 160, the second end bar 170, the first weight 180, and the second weight 190 are separated from one another.

In an assembled condition (FIG. 4), the first weight 180 is mounted on the elongated cylindrical shaft 161 of the first end bar 160. The first weight 180 contacts the collar 169 of the first end bar 160. The second weight 190 is mounted on the elongated cylindrical shaft 171 of the second end bar 170. The second weight 190 contacts the collar 179 of the second end bar 170. The first end 122 of the bar 120 is attached to the second end 164 of the elongated cylindrical shaft 161 of the first end bar 160. The second end 124 of the bar 120 is attached to the first end 172 of the elongated cylindrical shaft 171 of the second end bar 170. In one example, a length of an entirety of the element-interchangeable weight bar assembly in the first assembled condition (FIG. 4) is 6 feet.

FIG. 5 shows a side view (a first viewing direction perpendicular to the XZ plane) of the bar 120 of a curled shape in examples of the present disclosure. FIG. 7 shows a top view (a second viewing direction perpendicular to the XY plane) of the bar 120 (a curled bar seems flat in the second viewing direction) in examples of the present disclosure. An entirety of a centerline 127 of the bar 120 is on the XZ plane. The bar 120 further comprises a first circular arc section 132, a flat section 134, and a second circular arc section 136. The flat section 134 is positioned between the first circular arc section 132 and the second circular arc section 136. In examples of the present disclosure, a radius of curvature of the first circular arc section 132 is the same as that of the second circular arc section 136.

A diameter of the collar 169 of FIG. 2 of the first end bar 160 is larger than a diameter of the elongated cylindrical shaft 161 of the first end bar 160. A diameter of the collar 179 of FIG. 2 of the second end bar 170 is larger than a diameter of the elongated cylindrical shaft 171 of the second end bar 170.

Referring now to FIGS. 2, 4, and 6, the first end 122 of the bar 120 comprises a free end 611, a non-threaded section 624, and a threaded section 634. The threaded section 634 is shorter than the non-threaded section 624. In one example, with the non-threaded section 624, a length of the threaded section is reduced from 2.5 inch to 0.5 inch, thus reducing assembling time (because of less threads). The non-threaded section 624 is between the free end 611 and the threaded section 634. The second end 164 of the first end bar 160 comprises a cavity 632, a non-threaded section 644, and a threaded section 654. The cavity 632 comprises a stop 636. In the first assembled condition (FIG. 4), a vertical surface 610 of the free end 611 contacts the stop 636 of the cavity 632. The threaded section 634 of the free end 611 of the first end 122 of the bar 120 is engaged with the threaded section 654 of the second end 164 of the first end bar 160.

In one example, in the first assembled condition (FIG. 4), the non-threaded section 624 is loosely disposed in the cavity 632. In this case, an outer dimeter of the non-threaded section 624 is in a range from 80% to 95% of an inner diameter of the non-threaded section 644. In another example, in the first assembled condition (FIG. 4), the non-threaded section 624 is lightly pressed (still rotatable) in the cavity 632. In this case, an outer dimeter of the non-threaded section 624 is in a range from 100.01% to 102% of an inner diameter of the non-threaded section 644.

Similar to the first end 122 of the bar 120 and the second end 164 of the first end bar 160 shown in FIGS. 2, 4, and 6, in the first assembled condition (FIG. 4), the second end 124 of the bar 120 is engaged with the first end 172 of the second end bar 170. The second end 124 of the bar 120 comprises a free end, a non-threaded section, and a threaded section. The threaded section is shorter than the non-threaded section of the second end 124 of the bar 120. The non-threaded section of the second end 124 of the bar 120 is between the free end of the second end 124 of the bar 120 and the threaded section of the second end 124 of the bar 120. The first end 172 of the second end bar 170 comprises a cavity, a non-threaded section, and a threaded section. In the first assembled condition (FIG. 4), a vertical surface of the free end of the second end 124 of the bar 120 contacts the stop of the cavity of the first end 172 of the second end bar 170. The threaded section of the free end of the second end 124 of the bar 120 is engaged with the threaded section of the first end 172 of the second end bar 170.

FIG. 3 shows a side view of a weight bar assembly 300 in a separated condition in examples of the present disclosure. FIG. 8 shows a side view of the weight bar assembly 300 in an assembled condition in examples of the present disclosure.

Referring now to FIGS. 3 and 8. The weight bar assembly 300 comprises a bar 140, a first end bar 160, a second end bar 170, a first weight 180, and a second weight 190. In examples of the present disclosure, a shipping package to a customer includes the bar 140, the first end bar 160, the second end bar 170, the first weight 180, and the second weight 190. It is optional to include additional plurality of weights.

The bar 140 comprises a first end 142 and a second end 144. The first end bar 160 comprises an elongated cylindrical shaft 161 and a collar 169 attached to the elongated cylindrical shaft 161. The elongated cylindrical shaft 161 comprises a first end 162 and a second end 164. The second end bar 170 comprises an elongated cylindrical shaft 171 and a collar 179 attached to the elongated cylindrical shaft 171. The elongated cylindrical shaft 171 comprises a first end 172 and a second end 174.

In a separated condition (FIG. 3), the bar 140, the first end bar 160, the second end bar 170, the first weight 180, and the second weight 190 are separated from one another.

In an assembled condition (FIG. 8), the first weight 180 is mounted on the elongated cylindrical shaft 161 of the first end bar 160. The first weight 180 contacts the collar 169 of the first end bar 160. The second weight 190 is mounted on the elongated cylindrical shaft 171 of the second end bar 170. The second weight 190 contacts the collar 179 of the second end bar 170. The first end 142 of the bar 140 is attached to the second end 164 of the elongated cylindrical shaft 161 of the first end bar 160. The second end 144 of the bar 140 is attached to the first end 172 of the elongated cylindrical shaft 171 of the second end bar 170. In one example, a length of an entirety of the element-interchangeable weight bar assembly in the first assembled condition (FIG. 8) is 6 feet.

FIG. 9 shows a side view (a first viewing direction perpendicular to the XZ plane) of the bar 140 of a cylindrical shape in examples of the present disclosure. An entirety of a centerline 927 of the bar 140 is on the XZ plane and is on the XY plane.

A diameter of the collar 169 of FIG. 3 of the first end bar 160 is larger than a diameter of the elongated cylindrical shaft 161 of the first end bar 160. A diameter of the collar 179 of FIG. 3 of the second end bar 170 is larger than a diameter of the elongated cylindrical shaft 171 of the second end bar 170.

Referring now to FIGS. 3, 6 (right hand side), 8, and 9, the first end 142 of the bar 140 comprises a free end, a non-threaded section, and a threaded section. The threaded section is shorter than the non-threaded section of the free end of the first end 142 of the bar 140. In one example, with the non-threaded section, a length of the threaded section of the first end 142 of the bar 140 is reduced from 2.5 inch to 0.5 inch, thus reducing assembling time (because of less threads). The non-threaded section of the first end 142 of the bar 140 is between the free end of the first end 142 of the bar 140 and the threaded section of the first end 142 of the bar 140. The second end 164 of the first end bar 160 comprises a cavity 632, a non-threaded section 644, and a threaded section 654. The cavity 632 comprises a stop 636. In the first assembled condition (FIG. 8), a vertical surface of the free end of the first end 142 of the bar 140 contacts the stop 636 of the cavity 632. The threaded section of the free end of the first end 142 of the bar 140 is engaged with the threaded section 654 of the second end 164 of the first end bar 160.

In one example, in the first assembled condition (FIG. 8), the non-threaded section of the first end 142 of the bar 140 is loosely disposed in the cavity 632. In this case, an outer dimeter of the non-threaded section of the first end 142 of the bar 140 is in a range from 80% to 95% of an inner diameter of the non-threaded section 644. In another example, in the first assembled condition (FIG. 8), the non-threaded section of the first end 142 of the bar 140 is lightly pressed (still rotatable) in the cavity 632. In this case, an outer dimeter of the non-threaded section of the first end 142 of the bar 140 is in a range from 100.01% to 102% of an inner diameter of the non-threaded section 644.

Similar to the first end 142 of the bar 140 and the second end 164 of the first end bar 160 shown in 3, 6 (right hand side), 8, and 9, in the first assembled condition (FIG. 8), the second end 144 of the bar 140 is engaged with the first end 172 of the second end bar 170. The second end 144 of the bar 140 comprises a free end, a non-threaded section, and a threaded section. The threaded section is shorter than the non-threaded section of the second end 144 of the bar 140. The non-threaded section of the second end 144 of the bar 140 is between the free end of the second end 144 of the bar 140 and the threaded section of the second end 144 of the bar 140. The first end 172 of the second end bar 170 comprises a cavity, a non-threaded section, and a threaded section. In the first assembled condition (FIG. 8), a vertical surface of the free end of the second end 144 of the bar 140 contacts the stop of the cavity of the first end 172 of the second end bar 170. The threaded section of the free end of the second end 144 of the bar 140 is engaged with the threaded section of the first end 172 of the second end bar 170.

Those of ordinary skill in the art may recognize that modifications of the embodiments disclosed herein are possible. For example, a weight of the first weight 180 may vary. A weight of the second weight 190 may vary. A shipping package to a customer may include additional weights other than the first weight 180 and the second weight 190. Other modifications may occur to those of ordinary skill in this art, and all such modifications are deemed to fall within the purview of the present invention, as defined by the claims. 

1. A weight bar assembly comprising: a first bar comprising a first end; and a second end; a second bar comprising a first end; and a second end; a first end bar comprising an elongated cylindrical shaft comprising a first end; and a second end; and a collar attached to the elongated cylindrical shaft; a second end bar comprising an elongated cylindrical shaft comprising a first end; and a second end; and a collar attached to the elongated cylindrical shaft; a first weight; and a second weight; wherein the weight bar assembly is characterized by: a separated condition in which the first bar, the second bar, the first end bar, the second end bar, the first weight, and the second weight are separated from one another; a first assembled condition in which the first weight is mounted on the elongated cylindrical shaft of the first end bar; the first weight contacts the collar of the first end bar; the second weight is mounted on the elongated cylindrical shaft of the second end bar; the second weight contacts the collar of the second end bar; the first end of the first bar is attached to the second end of the elongated cylindrical shaft of the first end bar; and the second end of the first bar is attached to the first end of the elongated cylindrical shaft of the second end bar; and a second assembled condition in which the first weight is mounted on the elongated cylindrical shaft of the first end bar; the first weight contacts the collar of the first end bar; the second weight is mounted on the elongated cylindrical shaft of the second end bar; the second weight contacts the collar of the second end bar; the first end of the second bar is attached to the second end of the elongated cylindrical shaft of the first end bar; and the second end of the second bar is attached to the first end of the elongated cylindrical shaft of the second end bar.
 2. The weight bar assembly of claim 1, wherein the first bar is of a curled shape; wherein an entirety of a centerline of the first bar is on a plane; and wherein the second bar is of a cylindrical shape.
 3. The weight bar assembly of claim 2, wherein a diameter of the collar of the first end bar is larger than a diameter of the elongated cylindrical shaft of the first end bar; and wherein a diameter of the collar of the second end bar is larger than a diameter of the elongated cylindrical shaft of the second end bar.
 4. The weight bar assembly of claim 2, wherein the first end of the first bar comprises a free end; a non-threaded section; and a threaded section shorter than the non-threaded section of the first end of the first bar; wherein the non-threaded section of the first end of the first bar is between the free end of the first end of the first bar and the threaded section of the first end of the first bar; wherein the second end of the first end bar comprises a cavity comprising a stop; a non-threaded section; and a threaded section; wherein the weight bar assembly is characterized by: the first assembled condition in which a vertical surface of the free end of the first end of the first bar contacts the stop of the cavity of the second end of the first end bar; and the threaded section of the free end of the first end of the first bar is engaged with the threaded section of the second end of the first end bar.
 5. The weight bar assembly of claim 4, wherein the second end of the first bar comprises a free end; a non-threaded section; and a threaded section shorter than the non-threaded section of the second end of the first bar; wherein the non-threaded section of the second end of the first bar is between the free end of the second end of the first bar and the threaded section of the second end of the first bar; wherein the first end of the second end bar comprises a cavity comprising a stop; a non-threaded section; and a threaded section; wherein the weight bar assembly is characterized by: the first assembled condition in which a vertical surface of the free end of the second end of the first bar contacts the stop of the cavity of the first end of the second end bar; and the threaded section of the free end of the second end of the first bar is engaged with the threaded section of the first end of the second end bar.
 6. The weight bar assembly of claim 2, wherein the first end of the second bar comprises a free end; a non-threaded section; and a threaded section shorter than the non-threaded section of the first end of the second bar; wherein the non-threaded section of the first end of the second bar is between the free end of the first end of the second bar and the threaded section of the first end of the second bar; wherein the second end of the first end bar comprises a cavity comprising a stop; a non-threaded section; and a threaded section; wherein the weight bar assembly is characterized by: the second assembled condition in which a vertical surface of the free end of the first end of the second bar contacts the stop of the cavity of the second end of the first end bar; and the threaded section of the free end of the first end of the second bar is engaged with the threaded section of the second end of the first end bar.
 7. The weight bar assembly of claim 6, wherein the second end of the second bar comprises a free end; a non-threaded section; and a threaded section shorter than the non-threaded section of the second end of the second bar; wherein the non-threaded section of the second end of the second bar is between the free end of the second end of the second bar and the threaded section of the second end of the second bar; wherein the first end of the second end bar comprises a cavity comprising a stop; a non-threaded section; and a threaded section; wherein the weight bar assembly is characterized by: the second assembled condition in which a vertical surface of the free end of the second end of the second bar contacts the stop of the cavity of the first end of the second end bar; and the threaded section of the free end of the second end of the second bar is engaged with the threaded section of the first end of the second end bar.
 8. A weight bar assembly comprising: a curled bar comprising a first end; and a second end; a first end bar comprising an elongated cylindrical shaft comprising a first end; and a second end; and a collar attached to the elongated cylindrical shaft; a second end bar comprising an elongated cylindrical shaft comprising a first end; and a second end; and a collar attached to the elongated cylindrical shaft; a first weight; and a second weight; wherein the weight bar assembly is characterized by: a separated condition in which the curled bar, the first end bar, the second end bar, the first weight, and the second weight are separated from one another; and an assembled condition in which the first weight is mounted on the elongated cylindrical shaft of the first end bar; the first weight contacts the collar of the first end bar; the second weight is mounted on the elongated cylindrical shaft of the second end bar; the second weight contacts the collar of the second end bar; the first end of the curled bar is attached to the second end of the elongated cylindrical shaft of the first end bar; and the second end of the curled bar is attached to the first end of the elongated cylindrical shaft of the second end bar.
 9. The weight bar assembly of claim 8, wherein an entirety of a centerline of the curled bar is on a plane.
 10. The weight bar assembly of claim 9, wherein a diameter of the collar of the first end bar is larger than a diameter of the elongated cylindrical shaft of the first end bar.
 11. The weight bar assembly of claim 9, wherein the first end of the curled bar comprises a free end; a non-threaded section; and a threaded section shorter than the non-threaded section of the first end of the curled bar; wherein the non-threaded section of the first end of the curled bar is between the free end of the first end of the curled bar and the threaded section of the first end of the curled bar; wherein the second end of the first end bar comprises a cavity comprising a stop; a non-threaded section; and a threaded section; wherein the weight bar assembly is characterized by: the assembled condition in which a vertical surface of the free end of the first end of the curled bar contacts the stop of the cavity of the second end of the first end bar; and the threaded section of the free end of the first end of the curled bar is engaged with the threaded section of the second end of the first end bar.
 12. The weight bar assembly of claim 11, wherein the second end of the curled bar comprises a free end; a non-threaded section; and a threaded section shorter than the non-threaded section of the second end of the curled bar; wherein the non-threaded section of the second end of the curled bar is between the free end of the second end of the curled bar and the threaded section of the second end of the curled bar; wherein the first end of the second end bar comprises a cavity comprising a stop; a non-threaded section; and a threaded section; wherein the weight bar assembly is characterized by: the assembled condition in which a vertical surface of the free end of the second end of the curled bar contacts the stop of the cavity of the first end of the second end bar; and the threaded section of the free end of the second end of the curled bar is engaged with the threaded section of the first end of the second end bar.
 13. A weight bar assembly comprising: a cylindrical bar comprising a first end; and a second end; a first end bar comprising an elongated cylindrical shaft comprising a first end; and a second end; and a collar attached to the elongated cylindrical shaft; a second end bar comprising an elongated cylindrical shaft comprising a first end; and a second end; and a collar attached to the elongated cylindrical shaft; a first weight; and a second weight; wherein the weight bar assembly is characterized by: a separated condition in which the cylindrical bar, the first end bar, the second end bar, the first weight, and the second weight are separated from one another; and an assembled condition in which the first weight is mounted on the elongated cylindrical shaft of the first end bar; the first weight contacts the collar of the first end bar; the second weight is mounted on the elongated cylindrical shaft of the second end bar; the second weight contacts the collar of the second end bar; the first end of the cylindrical bar is attached to the second end of the elongated cylindrical shaft of the first end bar; and the second end of the cylindrical bar is attached to the first end of the elongated cylindrical shaft of the second end bar.
 14. The weight bar assembly of claim 13, wherein an entirety of a centerline of the cylindrical bar is on a plane.
 15. The weight bar assembly of claim 14, wherein a diameter of the collar of the first end bar is larger than a diameter of the elongated cylindrical shaft of the first end bar.
 16. The weight bar assembly of claim 14, wherein the first end of the cylindrical bar comprises a free end; a non-threaded section; and a threaded section shorter than the non-threaded section of the first end of the cylindrical bar; wherein the non-threaded section of the first end of the cylindrical bar is between the free end of the first end of the cylindrical bar and the threaded section of the first end of the cylindrical bar; wherein the second end of the first end bar comprises a cavity comprising a stop; a non-threaded section; and a threaded section; wherein the weight bar assembly is characterized by: the assembled condition in which a vertical surface of the free end of the first end of the cylindrical bar contacts the stop of the cavity of the second end of the first end bar; and the threaded section of the free end of the first end of the cylindrical bar is engaged with the threaded section of the second end of the first end bar.
 17. The weight bar assembly of claim 16, wherein the second end of the cylindrical bar comprises a free end; a non-threaded section; and a threaded section shorter than the non-threaded section of the second end of the cylindrical bar; wherein the non-threaded section of the second end of the cylindrical bar is between the free end of the second end of the cylindrical bar and the threaded section of the second end of the cylindrical bar; wherein the first end of the second end bar comprises a cavity comprising a stop; a non-threaded section; and a threaded section; wherein the weight bar assembly is characterized by: the assembled condition in which a vertical surface of the free end of the second end of the cylindrical bar contacts the stop of the cavity of the first end of the second end bar; and the threaded section of the free end of the second end of the cylindrical bar is engaged with the threaded section of the first end of the second end bar. 